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When a water tank is 30% full, it contains 27 gallons less than when it is 20% empty. How many gallons of water does the tank hold when it is full?

 May 25, 2020
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from  30 % full    means  70% empty

from 20% empty to 70% empty = 50% = 27 gallons

 

100% would be   2 x 27 = 54 gallons

 May 25, 2020

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